Hyundai Motor Company

Kia Motors Corporation

Young Un Kim

Jin Ho Kim

Jae Sang Lim

Gu Bae Kang

Jeong Won Rho

Kil Young Youn

Ji Wan Cha

Joo Young Park

Jeongwon Rho

Yong Jae Lee

Su Hyun Bae

Jae Ho Hwang

Seong Min Kim

Tae Young Chung

Seong Yeop Lim

Jeong Min Shin

Jae-Sang Lim

Yu Hyun Sung

Dong Jin Nam

Sung Hoon Choi

Jeong Won Roh

Seong Min M Kim

A hybrid electric vehicle (HEV) includes: a battery, a hybrid starter generator (HSG) starting an engine, and a controller that identifies a state of charge (SOC) of the battery upon when a reverse gear input is detected, determines whether to charge the battery by the HSG based on the identified SOC of the battery. In particular, the controller controls battery charging in a charging control mode based on a SOC level of the battery when it is determined that the HSG needs to charge the battery.

Hybrid electric vehicle and charge control method therefor

An apparatus for diagnosing failure of a motor driving system using a resolver signal includes a resolver sensing a rotor position and a rotational frequency of a motor, a fast Fourier transform operation unit configured to perform fast Fourier transform on an output signal of the resolver to convert the output signal into frequency signals, a specific frequency band extraction unit configured to extract, from among the frequency signals, a specific frequency band including one or more frequencies selected from among a PWM switching frequency applied to an inverter, a motor's rotational frequency, and a preset resolver excitation signal frequency, and a failure diagnosing unit configured to diagnose failure by comparing a sum or a highest voltage among voltages corresponding to the frequencies included in the specific frequency band with a predetermined reference value.

Apparatus and method of diagnosing failure of motor driving system using output signal of resolver

A method and a system for compensating an offset of a resolver, may include sampling an output signal of the resolver at a predetermined sampling frequency, comparing magnitudes of the sampled output signals of the resolver, when a difference in magnitude between the sampled output signals of the resolver is greater than a predetermined reference value, controlling the motor by a random pulse width modulation (RPWM) scheme in which switching frequencies of the switching elements in the inverter are arbitrarily changed, and compensating an offset of the resolver coupled to the motor while controlling the motor with the RPWM scheme.

Method and system for compensating offset of resolver

A control method of a hybrid vehicle capable of increasing regenerative braking efficiency by controlling an operating point of an electric motor includes steps of determining, by a hybrid control unit (HCU), a first torque for an generation mode operation of an electric motor, determining, by the HCU, whether the first torque and a speed of the electric motor correspond to an operating point for achieving charge of a battery through the generation mode operation, and, upon determining that the first torque and the speed of the electric motor correspond to an operating point at which the charge of the battery is disabled, changing, by the HCU, the first torque into a second torque that corresponds to an operating point at which the charge of the battery is achieved.

Hybrid vehicle and method of controlling motor of the same

A device and method for correcting a resolver offset of an eco-friendly vehicle is provided. The device and method are capable of correcting the resolver offset based on an angle of torsion occurring in a shaft of a motor rotor. Accordingly, the resolver offset is corrected more accurately.

Resolver offset correction device and method of eco-friendly vehicle

A system and method for reducing drive motor speed ripple of an electric vehicle are provided. The system includes an inverter that converts DC power supplied from a battery to AC power and supplies the AC power to the drive motor by inverter switching. A resolver is configured to detect a speed of the drive motor and a position of a rotor, a signal generator includes a microcontroller that is configured to generate a square wave signal. An integrator is configured to convert the square wave to a sine wave, and apply a sine-wave excitation input signal to the resolver. Furthermore, a motor controller is configured to operate the inverter through a PWM signal, adjust the frequency of the excitation input signal to prevent the inverter switching frequency of the inverter and the peaks of an output voltage signal sampled for speed calculation from overlapping.

System and method for reducing speed ripple of drive motor of electric vehicle

A method for controlling a hybrid vehicle includes: determining, by a controller, an operation mode of the hybrid vehicle based on operation state information of the hybrid vehicle; and controlling, by the controller, a first drive motor included in the hybrid vehicle based on angle information of a second drive motor of the hybrid vehicle provided by an angle sensor of the second drive motor when the operation mode of the hybrid vehicle is a hybrid electric vehicle mode. The hybrid electric vehicle mode is an operation mode in which an engine of the hybrid vehicle, the first drive motor, and the second drive motor drive the hybrid vehicle.

Method for controlling hybrid vehicle

The present disclosure relates to an apparatus for correcting an offset of a resolver of an environment-friendly vehicle. The apparatus includes a resolver offset correcting error determining unit configured to determine whether a resolver offset correction error occurs, by determining whether an engine clutch is released and a torque command of a motor. The apparatus further includes a motor speed change value calculating unit configured to calculate a change value of a speed of the motor when it is determined that the resolver offset correction error occurs and a controller configured to extract a resolver offset change value by using a resolve offset change value table for the change value of the speed of the motor.

Apparatus for correcting offset of resolver of environment-friendly vehicle, system including the same, and method thereof

A method for diagnosing demagnetization of a motor of a vehicle can accurately diagnose an irreversible demagnetization state of a permanent magnet of a traction motor or a hybrid starter-generator (HSG) without additional hardware, while minimizing influence of irreversible demagnetization of the permanent magnet of the traction motor or the HSG on vehicle performance. The method includes acquiring operating state information of the motor, determining whether a diagnosis entrance condition including a state in which the motor performs an electricity generating operation is satisfied based on the acquired operating state information of the motor, acquiring a direct current (DC) value in diagnosis, and determining whether irreversible demagnetization occurs by comparing the acquired DC value in diagnosis with a pre-stored DC current value in a normal state of the permanent magnet.

Method for diagnosing demagnetization of motor of eco-friendly vehicle

An inverter control method for a hybrid vehicle includes: monitoring a torque command and a motor speed of the vehicle in real-time; determining whether the motor speed is less than a first speed; determining whether an absolute value of the torque command is less than a first torque when the motor speed is less than the first speed; changing a switching frequency to a predetermined frequency when the absolute value of the torque command is less than the first torque; and controlling an inverter operation by generating a pulse-width modulation (PWM) signal with the switching frequency changed to the predetermined frequency.

Inverter control method for hybrid vehicle

An apparatus for compensating for a torque for a current order of a driving motor includes: a current order generator configured to: i) receive a torque order (Tref*), ii) generate a magnetic flux-based current order map using a generated driving point ratio (1/&#x3bb;max), and iii) generate a current order using the generated current order map; and an iron loss torque compensator configured to extract an iron loss torque compensation value for the generated current order and a speed (Wrpm) of the driving motor.

Apparatus and method for compensating for torque for current order of driving motor

A method of forcibly charging a high-voltage battery using a motor and a Hybrid Starter Generator (HSG) is provided. The method forcibly charges the high-voltage battery with maximum charging power using the motor and the HSG simultaneously. Particularly, the method includes calculating maximum chargeable power for the high-voltage battery using three dimensional (3D) maximum charging power maps of the motor and the HSG and adjusting maximum charging power using energy integration during forced charging using the motor and the HSG simultaneously. Additionally, excessive temperature prevention logics are applied for protecting the motor and the HSG from an excessive temperature in a forced charging mode.

Forced charging method for PHEV vehicles using motor and HSG

An apparatus and a method for controlling a motor are provided. The apparatus for controlling a motor includes a temperature sensor that is configured to detect a temperature of an inverter, and a variable amplifier that is configured to variably set an amplification gain that corresponds to the detected temperature of the inverter and amplify and output a resolver signal output from a resolver based on the variably set amplification gain, based on an excitation signal. A controller is then configured to estimate a position of a motor rotor based on the amplified resolver signal to calculate a flux angle and an excitation signal generator is configured to generate the excitation signal that corresponds to the calculated flux angle and output the generated excitation signal to the resolver.

Growing community of inventors

Gyeonggi-do, South Korea

Young Un Kim